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本文基于理论分析和模型试验,提出了逆流场中波要素变化的全过程预报模式,对逆流中破碎前的波要素变化,建议以波作用量守恒原理用三阶Stokes波进行计算,随着相对逆流流速的增大,波浪将发生破碎。文中给出了计算破碎时临界相对流速值和最大可能波高值的诺模图,并与试验值作了比较,二者是吻合的,文中还讨论了逆流中破后波的形态及若干性质,并基于试验资料,提出了计算破后波要素的经验公式。
Based on theoretical analysis and model tests, this paper proposes a whole-process forecasting model for the variation of mid-wave components in the counter-flow field. For the variation of wave components before the breakage in the countercurrent flow, it is suggested that the third-order Stokes wave be used to calculate the wave action. Countercurrent flow rate increases, the wave will be broken. In this paper, the nomogram obtained when calculating the critical relative velocity and the maximum possible wave height at crushing is given and compared with the experimental values. The two are in agreement. The shape and some properties of the after-wave in the countercurrent are also discussed. Based on the experimental data, an empirical formula for calculating the elements of broken waves is proposed.